Drive mechanism.



H. GROB. DRIVE MECHANISM.

APPLIOATION FILED 001'. 7, 1912.

Patented Aug. 11, 1914.

Fig.

INVFTNTOR a BY WITNE ATTORNEYS YHE NORRIS PETERS co PHOTO-LITHO. WASHINGTON. L). c.

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DRIVE MECHANISM.

incense.

Specification of Letters I atent.

Patented Aug. 11, 1914.

Application files October 7, 1212. Serial No. 724,269.

To all whom it may concern:

Be it known that I, I-IUso Gnon, a citizen of the Swiss Confederation,residing at Fiirstenwalde, in the Empire of Germany, have inventedcertain new and useful Improvements in Drive Mechanism, of which thefollowing is a full, clear, and exact description, such as will enableothers skilled in the art to which it appertains to make and use thesame. y

This invention relates to a drive mechanism, and, with regard to themore specific features, to apparatus suitable for driving atrain-lighting dynamo from a car axle.

The invention has for one object the provision of a drive mechanismwhich will be at once efficient, durable and dependable in operation.

Another object of the invention is the provision of means whereby afloating shaft may be used for the driving or driven member.

Another object is the reduction ofth stresses involved in the use of afloating shaft.

Another object is the provision of a mechanism wherein the driven memberis protected from the harmful effects of sudden variations of speed ofthe driving member.

Another object of the invention is the provision, in a drive mechanism,of a clutch so located as to be readily accessible for examination,lubrication, repairs or removal, and at the same time so arranged astobe easily protected from oil and other. extraneous matter.

()ther objects will be in part obvious and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations of elements and arrangement of parts which will beexemplified in the construction hereinafter set forth, and the scope ofthe application of which will be indicated in the following claims.

In the drawings, in which are shown one or more of various possibleembodiments of the several features of my invention,Figure 1 is a planof my invention as applied to a chain drive for a train lighting dynamo;Fig. 2 is a section along the line 22, Fig. 1, with parts removed toshow more clearly the interior structure; and Fig. 3 is a plan of amodification.

Similar reference characters refer to similar parts throughout theseveral views of the drawings.

In Figs. 1 and 2, A designates a portion of a car axle, B a sprocketwheel keyed or otherwise secured thereon, O a dynamo of any approvedconstruction, provided with the bearings D, E to support a shaft F, theshaft F being provided with a floating extension G. As the dynamosuspension forms no part of the present invention, I have notillustrated any mechanism for this purpose. Revolublymounted 011 theextension G of the shaft Fzis asleeve or collar II provided with asprocket wheel I and the clutch member Ksecured thereto. A chain L runsover the sprocket wheels 13 and I. The outer or floating end of theshaft extension G has connected or otherwise secured thereon a clutchmember M adapted to cooperate with the member K. Suitable means, such asa spring N, are provided to keep the sleeve H, and with it the clutchmember-K, pressed against the clutch member M, so that the clutch willnot transmit from the sprocket wheel I to the dynamo shaft F more than apredetermined torque. By having the member I close to the bearing E, thebending stresses in the shaft F and the bearing E, due to the pull ofthe chain L, are smaller than if the clutch were between said member Iand bearing E, and as a result there is usually no necessity of having athird hearing. A further advantage of this arrangement is that theclutch may be examined, cleaned, repaired or removed without disturbingthe sprocket wheels, chain or bearings. If desired, the clutch may beprotected from any oil used in the chain drive, as by inclosing theclutch in an oil-tight casing, mounted in any convenient manner. Such acasing, mounted sons to revolve with the collar, is shown at P.

In Fig. 3 the sprocket wheels B and I and the chain L are replaced bygear wheels Q, R, the rest of the apparatus being similar to Figs. 1 and2.

Obviously ,the invention is applicable whether the apparatus is designedfor the driving of a train lighting dynamo or not. For example, in Figs.1, 2 and 3 the parts may be reversed by having on the shaft F a motor orother source of mechanical power and by making the shaft A the drivenelement. In fact, the invention is useful in many cases where it isdesirable or advantageousto use a drive mechanism embodying one or moreof the features stated above as objects of the invention.

As many changes could be made in the above construction and manyapparently widely different embodiments of this inven tion could be madewithout departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanyingdrawings shall be interpreted as illustrative and not in a limitingsense.

It is also tojbe understood that the language used in the followinclaims is intended to cover all of the generic and specific features ofthe invention herein described and all statements of the scope of theinvention, which, as a matter of language, might be said to falltherebetween.

Having described my invention, what I claim as new and desire to secureby Letters Patent is V 1. A drive mechanism for a dynamo comprising abearing, a dynamo shaft journaled in said bearing and provided with afloating extension, a friction clutch adjacent the outer end of saidextension, means between said clutch and said bearing adapted to berotated by power from an external source, and means comprising saidclutch adapted to drive said shaft from said first means.

7 2. A drive mechanism comprisinga shaft with a floating extension, acollar on said extension, coacting clutch members connectingrespectively with said collar and said extension, means adapted to causethe coaction of said clutch members, a second shaft, and means fortransmitting power between said second shaft and said collar.

3. A drive mechanism comprising a shaft with a floating extension, acollar on said extension, a clutch adapted to cause the engagement ofsaid collar and said extension, a second shaft, and means fortransmitting power between said second shaft and said collar.

4. A drive mechanism comprising a shaft with a floating extension, acollar on said extension, a clutch adapted to maintain a yieldingengagement between said collar and said extension, a second shaft, and

means for transmitting power between said second shaft and said collar.

5. A drive mechanism comprising a shaft with a floating extension, acollar on said extension, coacting clutch members connected respectivelywith said collar and said extension, means adapted to cause the coactionof said clutch members, a second shaft, and means for transmitting powerbetween said second shaft and the portion of the collar farthest fromthe outer end of said extension.

6. A drive mechanism comprising a shaft with a floating extension, acollar on said extension, a clutch adapted to cause the engagement ofsaid collar and said extension, a second shaft, and means fortransmitting power between said second shaft and the portion of thecollar farthest from the outer end of said extension.

7. A drive mechanism comprising a shaft with a floating extension, acollar on said extension, a clutch adjacent the outer end of theextension adapted to cause the engagement of said collar and saidextension, a second shaft, and means for transmitting power between saidsecond shaft and said collar.

8. A drive mechanism comprising a shaft with a floating extension, acollar on said extension, a clutch adjacent the outer end of theextension adapted to maintain a yielding engagement between said collarand said extension, a second shaft, and means for transmitting powerbetween said second shaft and said collar.

9. A drive mechanism comprising a shaft with a. floating extension, acollar on said extension, a clutch adjacent the outer end of theextension adapted to cause the engagement of said collar and saidextension, a second shaft, and means for transmitting power between saidsecond shaft and the portion of the collar farthest from the outer endof the extension.

10. A drive mechanism comprising a shaft with a floating extension, acollar on said extension, a clutch adjacent the outer end of theextension adapted to maintain a yielding engagement between said collarand said extension, a second shaft, and means for transmitting powerbetween said second shaft and the portion of the collar farthest fromthe outer end of the extension.

11. A drive mechanism comprising a shaft with a floating extension, acollar on said extension, a clutch adjacent the outer end of theextension adapted to cause the engagement of said collar and saidextension, and means inclosing the clutch.

12. A drive mechanism comprising a driving and a driven shaft, one ofsaid shafts being provided with a bearing and a floating extensionbeyond said bearing, a clutch member secured adjacent the end of saidextension, a collar on said extension between said bearing and saidclutch member, a second clutch member secured on said collar, meanstending to keep said clutch members in yielding engagement, and meansfor transmitting power between said collar and the other shaft.

13. A drive mechanism comprising a car axle, a dynamo shaft with afloating extension, a clutch member adjacent the outer end of saidextension and secured to said extension, a collar on the portion of saidextension farthest from said outer end, a clutch member on said collar,means for maintaining said clutch members in yielding engagement, andmeans for transmitting power between said collar and said axle.

14. A drive mechanism comprising a car axle, a dynamo shaft with afloating extension, a friction clutch member adjacent the outer end ofsaid extension and secured to said extension, a collar on the portion ofsaid extension farthest from said outer end, a friction clutch member onsaid collar, means for maintaining said clutch members in yieldingengagement, and means for transmitting power between said collar andsaid axle.

15. A drive mechanism comprising a car axle, a dynamo shaft with afloating extension, a clutch member adjacent the outer end of saidextension and secured to said extension, a collar on the portion of saidextension farthest from said outer end, a clutch member on said collar,means for maintaining said clutch members in yielding engagement, andmeans comprising a chain and sprocket Wheels for transmitting powerbetween said collar and said axle.

16. A drive mechanism comprising a car axle provided with a sprocketwheel, a dynamo shaft with a floating extension, a collar on the portionof said extension farthest from the outer end thereof, a sprocket wheelon said collar, a friction clutch adjacent the outer end of said collarand extension and connected to said collar and extension, and a chainadapted to connect said sprocket Wheels.

In testimony whereof I affix my signature, in the presence of twowitnesses.

HUGO GROB.

Witnesses:

H. WATSON, DELOS G. HAYNES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C."

